Two ways to reduce the impact of humans on climate change

Removing carbon dioxide from the atmosphere is a substitute for reducing emissions at the source (WSJ, Feb. 2020). What would more often result in the efficient choices between the two options, a pollution tax or government officials deciding the "best" way to reduce CO2 in the atmosphere?

People are studying at least three ways of reducing the amount of  CO2 released during the production of concrete (WSJ, Feb. 2020). What would more often result in the efficient choices between the three options, a pollution tax or government officials deciding the "best" way to reduce CO2 in the atmosphere?